Virus Prevalence - September 2007

Virus NamePrevalencePercentageInstances
W32/Netsky35.68% 1769725
W32/Mydoom18.18% 901686
W32/Bagle14.21% 704871
W32/Mytob9.1% 451229
W32/Virut7.71% 382556
W32/Zafi2.13% 105798
W32/Bagz1.94% 96169
W32/Rontokbro1.11% 54937
W32/Stration0.92% 45484
W32/VB0.88% 43517
W32/Lovgate0.74% 36496
W32/Sality0.71% 35185
W32/Rjump0.69% 34375
W32/Parite0.68% 33773
W32/Funner0.48% 23833
VBS/Small0.45% 22085
W32/Klez0.38% 18853
W32/Jeefo0.35% 17237
W32/Fono0.3% 14969
W32/SirCam0.26% 12751
W32/Sohanad0.23% 11616
W32/Small0.23% 11278
W32/Looked0.22% 11096
W32/Perlovga0.21% 10237
W32/Hakaglan0.18% 8878
VBS/Butsur0.17% 8680
W32/Nuwar0.17% 8651
W32/Tenga0.17% 8187
W32/Allaple0.13% 6240
W32/Wukill0.12% 6075
W32/Mabutu0.12% 6122
W32/Yaha0.1% 4848
VBS/Redlof0.09% 4595
W32/Chir0.09% 4482
W32/Alman0.06% 3198
W32/Womble0.06% 3013
W32/Pykse0.05% 2491
W32/Sober0.04% 1823
W32/Drowor0.04% 2203
W32/Puce0.04% 2102
W32/Sobig0.03% 1267
W32/Bugbear0.03% 1538
W32/Funlove0.03% 1278
W32/Opaserv0.03% 1443
W32/Oror0.03% 1494
W32/Saburex0.03% 1452
W32/Polip0.02% 1108
W32/Spybot0.02% 930
W32/Valla0.02% 1116
VBS/Solow0.02% 1079
W32/Banwarum0.02% 938
W32/Plexus0.02% 833
W32/Moonlight0.02% 1176
W32/Maslan0.02% 1121
W32/Detnat0.01% 331
W32/Elkern0.01% 433
ALS/Bursted0.01% 461
W32/Darby0.01% 370
W32/Banwor0.01% 274
VBS/Soraci0.01% 516
W32/Nimda0.01% 280
W32/Swen0.01% 256
W32/Dref0.01% 603
W32/Braban0.01% 365
W32/Dzan0.01% 157
W32/Korgo0.01% 328
W32/Expiro0.01% 382
W32/Dumaru0.01% 505
W32/Areses0.01% 498
W32/Mkar0.01% 485
W32/Sdbot0.01% 410
W32/Wenna0.01% 484
W32/Mypis0.01% 381
W32/Vasor0% 43
Titch0% 1
W97M/Ethan0% 57
W32/Randon0% 210
W32/Kriz0% 58
VBS/LoveLetter0% 168
Class0% 15
W95/Beast0% 1
Onex0% 7
W32/Gibe0% 8
W32/Braid0% 1
W32/Mapson0% 4
Mumu0% 7
W32/Fizzer0% 1
Smack0% 8
AntiEXE0% 1
XF/Netsnake0% 23
JS/Wonka0% 9
W95/Lovesong0% 2
W32/Forbot0% 6
W32/Poebot0% 39
Nottice0% 2
W32/Apsiv0% 1
W32/Antiman0% 53
Winvir0% 1
W32/Mimail0% 95
W32/Tufik0% 125

Background

The Virus Bulletin prevalence table is compiled monthly from virus reports received by Virus Bulletin; both directly, and from other companies who pass on their statistics.

Reports are included only if they are confirmed, and hence, in conjunction with the WildList, the prevalence table provides a useful indication of the relative prevalence of various virus found in the wild at the time.

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